Fuel Gauge Sending Unit - Toro Groundsmaster 300 Series Service Manual

Fuel Gauge Sending Unit (Fig. 21)
1. Remove the two wires from top of sending unity.
2. Loosen and remove screws securing sending unit to
fuel tank.
DANGER
Because fuel is flammable, caution must be
used when the sending unit is removed. Va ­
pors may build up and be ignited by a spark
or flame source many feet away. Prevent
sparks and DO NOT smoke while working on
the fuel system, to avoid the possibility of an
explosion and personal injury.
3. Carefully remove sending unit from fuel tank.
4. Connect an ohmmeter (set on the R x 1 scale) across
the two terminals of the sending unit. As the float is
moved up and down, the resistance (in Ohms) will be
registered on the meter. The resistance should vary
between 90 and 0 Ohms.
5. If not change in the resistance is measured as the
float is moved up and down, the sending unit is faulty
and must be replaced.
6. Reverse steps 1 - 4 to install the sending unit.
®
Groundsmaster 300 Series Page 6 - 29
Figure 21
Testing